Abstract
The anaerobic photodegradation behaviors of bulk alternating copolymers of propylene/carbon monoride (CO) and ethylene/CO have been studied by irradiation with 2537-A light. Photolysis of the former resulted in weight loss, molecular weight depression, cross-linking, and the formation of hydroxyl and terminal vinyl groups. The room temperature quantum yields of chain scission and Norrish type II reactions were found to be 0.015±0.002 and 0.011±0.002, respectively. Ethylene/CO alternating copolymer does not undergo Norrish type II photolysis because of the absence of γ-hydrogens. Even the Norrish type I processes occur with low probability probably because of the strong «cage effect» and reactivity of the primary radicals produced
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